Add foreach as alternative to map (#952)

* Added Foreachers

* Changed CheckTypes to use foreach

* Check widths now uses foreach

* Finished merge, added foreachers to added stmts

* Address reviewer feedback

1 files changed, 3 insertions, 0 deletions

diff --git a/src/main/scala/firrtl/Emitter.scala b/src/main/scala/firrtl/Emitter.scala
index 578782ce..7be049ed 100644
--- a/src/main/scala/firrtl/Emitter.scala
+++ b/src/main/scala/firrtl/Emitter.scala
@@ -125,6 +125,9 @@ case class VRandom(width: BigInt) extends Expression {
   def mapExpr(f: Expression => Expression): Expression = this
   def mapType(f: Type => Type): Expression = this
   def mapWidth(f: Width => Width): Expression = this
+  def foreachExpr(f: Expression => Unit): Unit = Unit
+  def foreachType(f: Type => Unit): Unit = Unit
+  def foreachWidth(f: Width => Unit): Unit = Unit
 }
 
 class VerilogEmitter extends SeqTransform with Emitter {